Lodash _.assignIn() Method

The Lodash _.assignIn() Method is like the _.assign() method except that it iterates over its own and inherited source properties. Subsequent source objects overwrite property assignments of previous sources. This method mutates the object.

Syntax:

_.assignIn( dest_object, [src_obj])

Parameters: This method accepts two parameters as mentioned above and described below:

• dest_object: This is the destination object.
• src_obj: These are the source objects.

Return Value: This method returns an object.

Example 1:

Javascript

// Defining Lodash variable
const _ = require('lodash');

function Gfg1() {
  this.a = 1;
}

function Gfg2() {
  this.c = 3;
}

Gfg1.prototype.b = 10;
Gfg2.prototype.d = 40;

console.log(_.assignIn( { a: 4 },
    new Gfg1, new Gfg2));

Output:

{ a: 1, b: 10, c: 3, d: 40 }

Example 2:

Javascript

// Defining Lodash variable
const _ = require('lodash');

function Gfg1() {
  this.a = 1;
}

function Gfg2() {
  this.c = 3;
}

console.log(_.assignIn( { a: 4 },
    new Gfg1, new Gfg2));

Output:

{ a: 1, c: 3 }